function
jsc.noFTL
func: (...args: any[]) => any
): void;
Prevents a function from ever being compiled by the FTL JIT, JavaScriptCore's highest optimization tier. The function can still reach the baseline and DFG tiers. Use it to check whether a bug or a performance difference is specific to FTL-compiled code.
Only affects compilations that happen after the call, so call it before func gets hot. Does nothing if func is not a JavaScript function.